Answer: a
Explanation: Production of lysine involves two stages among which the first stage is the formation of diaminopimelic acid (DAP) by E.coli.

8. Which of the following raw materials are important for the production of glutamic acid?
a) glycerol
b) corn-steep liquor
c) tryptone
d) biotinView Answer

Answer: d
Explanation: For glutamic acid the medium generally consists of a carbohydrate, peptone, inorganic salts, and biotin; the concentration of biotin has a significant influence on the yield of glutamic acid.

9. Insulin was isolated from which of the following organs of animals?
a) small intestine
b) tongue
c) pancreas
d) stomachView Answer

Answer: c
Explanation: Commercial insulin for the therapy of diabetes was isolated from animal pancreatic tissue.

10. Which of the following yeast is used for the production of riboflavin?
a) Saccharomyces cerevisiae
b) Eremothecium ashbyi
c) Saccharomyces rouxii
d) Candida utilisView Answer

Answer: b
Explanation: Eremothecium ashbyi is used for the production of riboflavin which is used as a vitamin supplement.